Th-rich zircon from peralka line A-type granite: Mineralogical features and petrological implications
作者: Lei XieRucheng WangXiaoming ChenJiansheng QiuDezi Wang
作者单位: 1State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University
刊名: Chinese Science Bulletin, 2005, Vol.50 (8), pp.809-817
来源数据库: Springer Nature Journal
DOI: 10.1007/BF03183683
关键词: Th-rich zirconmineralogical genesisdeep-sourced magmaperalkaline A-type graniteeastern China
英文摘要: Abstract(#br)The Taohuadao, Qingtian and Laoshan granites are three typical late Yanshannian peralkaline granitic plutons in the coastal area, eastern China. In this paper, internal structures and chemical compositions of zircon from these A-type granites were investigated by electron microprobe. It is shown that zircon grains are mainly composed of two distinctly separated parts. One is rich in Th (ThO 2 >1 wt%, and ThO 2 /UO 2 >2), and attains ThO 2 up to 10.1 wt%; such value exceeds the dissolution limit of Th in the zircon structure (ThO 2 =5.5±.5 wt%) determined in previous experiment. On the other hand, the other part is poor in Th (ThO 2 ...
全文获取路径: Springer Nature  (合作)
影响因子:1.319 (2012)

  • zircon 锆石
  • granite 花岗岩
  • features 特征